Abstract #2737

High Resolution DWI with Readout-segmented EPI and computed DWI as a potential alternative of High Resolution Dynamic Contrast Enhanced MRI in evaluating Breast Cancer

MASAKO Y KATAOKA¹, Shotaro Kanao¹, Mami Iima¹, Natsuko Onishi¹, Makiko Kawai¹, Akane Ohashi¹, Rena Sakaguchi¹, Masakazu Toi², and Kaori Togashi¹

¹Diagnostic Imaging and Nuclear Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan, ²Breast Surgery, Kyoto University, Kyoto, Japan

Eighteen breast lesions underwent high resolution (HR) diffusion-weighted MRI (DWI) with a resolution of 1.1 x 1.1 x 1.4 mm and b value of 0 and 850 sec/mm² using readout-segmented echo-planar imaging (rs-EPI). Computed (c) DWI with b value of 1200 sec/mm² were calculated. Lesion conspicuity and maximum size on these images were compared to those on HR DCE MRI. Masses showed relatively good lesion conspicuity on rs-EPI, slightly deteriorated on cDWI. Size was similar between rs-EPI and HR-DCE, while slightly smaller for cDWI. In contrast, NME is often poorly visualized on rs-EPI and cDWI, resulting in underestimation of NME.

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